Sinjai climate — normals and trends
Sinjai (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.7 °C and it receives 1,812 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is November (26.7 °C on average) and the coldest is July (24.6 °C). Rainfall peaks in June.
Sinjai averages 0 frost days, 25 hot days (≥ 30 °C) and 271 rainy days per year.
Sinjai has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.6 °C (on 25 January 2024) and the coldest 20.5 °C (on 15 August 1946).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
SinjaiSouth Sulawesi
- coords
- -5.12°, 120.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.7°C
Average daily high
27.9°C
Average daily low
24.0°C
Annual rainfall
1,812mm
Sunshine / day
10.7h
Mean relative humidity
81%
Average peak wind
12.1km/h
Seasonal range
2.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
25 d/yr
Rainy days (≥ 1 mm)
271 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.9 °C
Average feels-like low
27.9 °C
Average peak gust
26.0 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
19.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.81 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
32.6 °C
25 January 2024
Coldest day
20.5 °C
15 August 1946
Wettest day
146 mm
20 June 2017
Windiest day
27.3 km/h
12 January 1943
Strongest gust
55.1 km/h
19 January 2006
Hottest feels-like
39.6 °C
27 February 2010
Coldest feels-like
21.7 °C
14 August 1946
Sunniest day
12.0 h
12 January 1948
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.3 °C | +0.8 °C | 305 mm | +127 mm |
| Feb | 29.7 °C | +1.1 °C | 139 mm | -26 mm |
| Mar | 29.6 °C | +1.1 °C | 153 mm | -36 mm |
| Apr | 29.2 °C | +1.1 °C | 207 mm | +34 mm |
| May | 28.6 °C | +1.2 °C | 256 mm | +58 mm |
| Jun | 27.3 °C | +0.6 °C | 414 mm | +205 mm |
| Jul | 27.5 °C | +1.1 °C | 191 mm | +17 mm |
| Aug | 27.7 °C | +1.0 °C | 142 mm | +40 mm |
| Sep | 29.1 °C | +1.5 °C | 71 mm | +9 mm |
| Oct | 30.7 °C | +1.9 °C | 94 mm | +31 mm |
| Nov | 30.2 °C | +1.0 °C | 174 mm | +62 mm |
| Dec | 29.9 °C | +1.2 °C | 159 mm | -28 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Sinjai?
Sinjai has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.7 °C and it receives 1,812 mm of precipitation per year.
What is the hottest day ever recorded in Sinjai?
The hottest day measured in Sinjai between 1940 and 2025 was 25 January 2024, reaching 32.6 °C.
What is the coldest day in Sinjai?
The coldest day measured in Sinjai between 1940 and 2025 was 15 August 1946, at 20.5 °C.
Does it snow in Sinjai?
Almost never: Sinjai sees virtually no snow, with about 0 frost days per year.
Has the climate of Sinjai warmed?
Yes: Sinjai warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sinjai?
The wettest day measured in Sinjai between 1940 and 2025 was 20 June 2017, with 146 mm of rain in 24 hours.
What was the windiest day in Sinjai?
The windiest day measured in Sinjai between 1940 and 2025 was 12 January 1943, with winds reaching 27.3 km/h.
What is the warmest month in Sinjai?
The warmest month in Sinjai is November (26.7 °C on average); the coldest is July (24.6 °C).
How much does it rain in Sinjai?
Sinjai receives on average 1,812 mm of precipitation per year, spread over about 271 rainy days.
Is it sunny in Sinjai?
Sinjai gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in Sinjai?
Yes: Sinjai has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sinjai?
In Sinjai, between 1940 and 2025, the highest apparent temperature reached 39.6 °C on 27 February 2010, and the lowest was 21.7 °C on 14 August 1946.
Compare Sinjai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sinjai